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ID = 25193
Tube type:  Beam Power Tube 
Identical to 4604
Similar Tubes
Other characteristic (electr. data):

Base Octal (Int.Octal, IO) K8A, USA 1935 Top contact with a cap.
Filament Vf 6.3 Volts / If 0.65 Ampere / Direct / Specified voltage AC/DC

Fast heating version of 6146A. 1 second warm-up time.

Information source Tube Lore (II)   

4604: RCA TT
Götz Linss † 27.06.21

4604_pin_1.png 4604: Manufacturer's Literature
Emilio Ciardiello

Just Qvigstad
4604: RCA Transmitting Tubes TT-5
Emilio Ciardiello

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